/*
 * Copyright 2010-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.data.gemfire.test.support;

import java.util.concurrent.atomic.AtomicLong;

/**
 * The IdentifierSequence class is an Identifier (ID) generator generating unique IDs in sequence.
 *
 * @author John Blum
 * @see java.lang.System#currentTimeMillis()
 * @see java.util.concurrent.atomic.AtomicLong
 * @since 1.5.3
 */
@SuppressWarnings("unused")
public abstract class IdentifierSequence {

	private static final AtomicLong ID_SEQUENCE = new AtomicLong(System.currentTimeMillis());

	public static long nextId() {
		return ID_SEQUENCE.incrementAndGet();
	}

}
